Cat flea (or generic flea)

Found on hosts such as cats, dogs, and other mammals, as well as in their bedding, carpets, and surrounding environment.

Blood of mammals and birds

Wingless insects known for powerful jumping abilities, spending most of their adult lives on a host feeding and reproducing.

Can cause itchy bites, skin irritation, and transmit tapeworms or disease agents to pets and humans; minimal ecological benefit besides serving as food for some predators.